New to Largescale brushless Need CRT X1 Pro Help

[riverat1540]

I got a crt pro x1 on a trade and want to convert it to brushless, i want to run a 6s 5000mah with an affordable esc thinking of mamba monster. wanting to know what motor i should get if i want 55mph as top speed. wonderin if i should go for the motor combo from castle and if so what size should i go, im gonna run the stock diffs to start off and play the rest by ear, what is a good affordable battery to use. i already ordered the crt conversion mounts for the crt and just need to know what would be good for 55 with minimum temp issues. any imput is much appreaciated and i will document my build here as well to get more tips along the way. i dont want to break the bank on this but am willing to spend what it takes to acheive my goal.